Die and method of making the same



Patented 15, 1924.

PATENT OFFICE.

FRANK I. YOGAN, 0F CANTDN, OHIO.

DIE LND HETHOD 0F MAKING THE BAIE.

Application nled July 8,

To all whom it may concern:

Beit known that I, FRANK M. VoeAN, a citizen of the United States, residn at Canton, in the county of `Stark and tate of Ohio, have invented a new and useful Die and Method of'Making the Same, of which the followin is a specification.

This invention re ates to dies for forming sheet metal and the method of making the same, and has for its objects to provide a novel method of making dies for forming sheet metal ceilings and the like, b means of which a trueup r die is pro yuced in lead, whereby a per ect impresion may be obtained; and in which the high points of A'one die preferably do not contact with the low points of the other die, the dies meeting upon the sheet metal only around the border or edge of the metal,- thus permitting the metal to be bent or formed to the desired shape rather than stretching the metal into the required form, as is done in the usual dies now in general use.

The above and other objects may be at tainedA by producing the dies in the manner v illustrated in the accompanying drawing, in which- Figure 1 is a plain view of the original plasterl or wood mold; I

Fig. 2, a section on the line 2-2, Fig. 1;

Fig. 3, a view similar to Fig. 2, showing also the original plaster impression made from the plaster mold;

Fig. '4, a fragmentary section of the original plaster mo d after the same has beencut awa Fig. 5, a similar view of the original plaster impreion;

Fig. 6, a ntary sectional view of the iron die obtained by using the plaster mold shown in Fig. 4, as a pattern;

Fig. 7, a fragmentary sectional view showin the manner in which the second plaster impression is obtained from the origmal plaster impression shown in Fi 5;

Fig. 8, a similar view showi t e manner in which the lead die is molded from the imi? mildfn i n f aw ig. ,a gmentary section view o iron die'shown in Fig. 6, and the lead die shown in Fig. 8, showing the manner in which the dies lit to ther; and

Fig. 10, a section view through the iron ma semi m. 51ans.

the sheet metal being and lead dies showin being shown in the which is the reverse of the face 2 of the plaster or wood mold 1.

, The original plaster or wood mold 1 is then preferably cut away as shown in Fig. 4, all of the low points in the mold being deepened, formin the contour indicated at 5 in said li re, t e dotted line indicatin the origin contour of the face of the mol showing the ints at which the mold is cut away an the amount of material removed.

The original mold 1 after being cut away as shown 1n Fig. 4, is then used as a pattern and placed in an ordinary molding flask, the iron die 7 being molded therefrom and having the contour 8 conforming to the cut away ,contour 5 of the original mold 1. This iron die is used as the lower die in the press or hammer.

The plaster impression- 3 is then preferably cut away as shown in Fig. 5, all of the low points in said impression being deepened, formin the contour as shown at 9 1n said ligure, t e dotted line 10 indicating the ori 'nal contour of the plaster impression an showing the portions of the impression which are cut away.'

The original plaster impression 3 is then inverted as shown in Fig. 7, and used as a mold in which thesecond plaster impression 11 is rast, said' second impression, of course, having the contour 12 which isthe reverser of the contour 9 of the original plaster impression.`

This second plaster impression is then used as a pattern and placed in the sand in an ordina foundry ask and an iron mold 13 is cast t erein being the exact reproduction of the second plaster impression. This `up r die in lead mi shape,

iron mold as shown at 13 in Fig. 8, is then inverted and placed in a press and lead, or other soft metal, oured therein, as shown at 14 in Fig. 8, t e lead impression being hammered to place in the iron mold, producing a lead upperdie to be used in the pressI or hammer to co-act with the iron die 7 as shown in Fi After the of metal, of heavier gage than is used in the stamping of the products, may then be laced on the iron mold and hammered down E the lead die and is fastened to the face ci the lead die to protect the wearing surfaces thereof.

If desired, two or three extra lead dies may be made in theabove manner at this time to be stored away for future emergency use, when the first lead die becomes worn. In order that the lead and iron dies used in the hammer or press will always be pro erly located with respect to each other, t eoriginal plaster mold 1 is provided upon one side with square sockets 15 and upon the other side with rounded sockets 16. When the plaster impression 3 is made from the original plaster mold, lugs4 17 will thus be formed upon said plaster impression, cornding to the sockets 15 and -16 of the mold. Through out the several steps of the operation, sockets and lugs will thus be formed upon the different members.v producin the sockets 15 and 16 upon the lower these Viron 'e 7 and the lugs 17 corresponding therewith upon the up r lead die 14, thus assuring the properre ative location of the ilpper and lower diesl within the press or emmer.

It will thus be seen that a process or method is proyided for producing a true from the iron casting or d, as by casting the lead die in the iron mold and then transferring it to the press or hammer to co-o rate with the iron die, any larities in the lower iron die due to warping in casting, may be overcome by placing him lates between the lead die and the reciprocating head of the press or hammer.

By cuttin original l r mo d and impression, it will be seen any point exceptingl at the edge or border as shown at 18, and t e lugs' 17 and sockets 15 and 16, the low points of each of the dies bein'gspaced from the hi points of the other die. As shown in ig. 10, the metal sheet 19 is not stretched or drawn by the dies, but is formed or bent to the required both dies engaging the metal sheet only at the border or edge 18 of the design formed .in the sheet, the remaining portions of the sheet being en onlyu n one side pr the other, the h' points o one die bending or forming the 9. lead die is thus formed, a sheet consists in vformin awa the low points of the` at the two dies do not contact atsheet over the ada 4being permitted to flow inward toward the center of the dies, the edge portions 18 of the dies not engaging the sheet upon both sides until the upper die has completed its downward movement at which time the sheet will be completely formed. With the method above described and illustrated in the accompanying drawing, the iron and lead dies maybe formed to properly correspond in sha and to cooperate with eaeh other to hgnd the sheet metal into the desired form, the objections to the usual form of close fitting dies being overcome, as the sheet metal is allowed to flow over the, dies toward the center thereof as it is beni'I or formed by the operation of the dies, doing away with the tearing of the metal at certain points.

It has been found by experience that one stroke of a ress equipped with the imved dies a ve described, is suicient to orm sheet metal, while with the common typeof dies .in which the-inetal is engaged hpon both sides throughout its extent, by the dies, it usually requires three or more blows of the hammer to properly form the metal, owing to the greater resistance met in stretching the metal at certain points.

1. The method of forming dies which a mold having sockets upon opposite .e portions, making a laster impression 4of the same, cing- 1: in the impreesion interiittin with said u :vusing the original mo as a pattern to cast an iron die, miilrings'iiI second plaster impression from the named plaster impression, using said second plaster impression as a yttei'n to cast an iron mold and melting a cad of. the iron mold, said ead impresion forming a die to co-act with the iron die.

2. llie method of forming dies which oonsists in form" a mold', making a plaster impression of e same, cutting away the low points of the mold and impression, using the cut away mold as a pattern to cast an iron die, making a second plaster impression of the cut awa plaster impression, .using the second p aster impression lll lll

impression of the same, cutting awa)r the low points of the mold and impression and reproducing the cut. away mold and im pression in metal.

4. The method of forming dies which consists in forming a mold, making a plaster impression of the same, cutting away the low points of the mold and impresion and reproducing the cut awa mold in hard metal and the cut away p aster impression in soft metal.

5. The method of forming dies which consists in forming a mold, making a plaster impression of the same, cutting away the 16 low points of the mold and impression,

using the cut away mold as a pattern fo cast the metal die, molding an impression from the cut away plaster impression and molding' a metal die from the last named impression.

6. The method of forming dies which consists in forming a mold, making a plaster impression of the same, cutting away the low points of the mold and impresion, using the cut away mold as a pattern to cast the metal die, molding an iron impression from the cut away plaster impression and molding a leadA die from the iron impression.

FRANK M. VOGAN. 

